Revert of GrBatchPrototype (patchset #30 id:570001 of https://codereview.chromium.org/845103005/)

Reason for revert:
creates large performance regression

Original issue's description:
> GrBatchPrototype
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/d15e4e45374275c045572b304c229237c4a82be4

TBR=bsalomon@google.com,joshualitt@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/862823004
diff --git a/src/gpu/GrInOrderDrawBuffer.cpp b/src/gpu/GrInOrderDrawBuffer.cpp
index 1453276..70d61ec 100644
--- a/src/gpu/GrInOrderDrawBuffer.cpp
+++ b/src/gpu/GrInOrderDrawBuffer.cpp
@@ -20,8 +20,7 @@
     : INHERITED(gpu, vertexPool, indexPool)
     , fCmdBuffer(kCmdBufferInitialSizeInBytes)
     , fPrevState(NULL)
-    , fDrawID(0)
-    , fBatchTarget(gpu, vertexPool, indexPool) {
+    , fDrawID(0) {
 
     SkASSERT(vertexPool);
     SkASSERT(indexPool);
@@ -211,7 +210,6 @@
     Draw* draw = static_cast<Draw*>(&fCmdBuffer.back());
 
     if (!draw->fInfo.isInstanced() ||
-        draw->fInfo.primitiveType() != info.primitiveType() ||
         draw->fInfo.verticesPerInstance() != info.verticesPerInstance() ||
         draw->fInfo.indicesPerInstance() != info.indicesPerInstance() ||
         draw->fInfo.vertexBuffer() != info.vertexBuffer() ||
@@ -268,29 +266,6 @@
     this->recordTraceMarkersIfNecessary();
 }
 
-void GrInOrderDrawBuffer::onDrawBatch(GrBatch* batch,
-                                      const GrPipelineBuilder& pipelineBuilder,
-                                      const GrScissorState& scissorState,
-                                      const GrDeviceCoordTexture* dstCopy) {
-    if (!this->recordStateAndShouldDraw(batch, pipelineBuilder, scissorState, dstCopy)) {
-        return;
-    }
-
-    // Check if there is a Batch Draw we can batch with
-    if (kDrawBatch_Cmd != strip_trace_bit(fCmdBuffer.back().fType)) {
-        GrNEW_APPEND_TO_RECORDER(fCmdBuffer, DrawBatch, (batch));
-        return;
-    }
-
-    DrawBatch* draw = static_cast<DrawBatch*>(&fCmdBuffer.back());
-    if (draw->fBatch->combineIfPossible(batch)) {
-        return;
-    } else {
-        GrNEW_APPEND_TO_RECORDER(fCmdBuffer, DrawBatch, (batch));
-    }
-    this->recordTraceMarkersIfNecessary();
-}
-
 void GrInOrderDrawBuffer::onStencilPath(const GrPipelineBuilder& pipelineBuilder,
                                         const GrPathProcessor* pathProc,
                                         const GrPath* path,
@@ -435,6 +410,7 @@
         return;
     }
 
+
     CmdBuffer::Iter iter(fCmdBuffer);
 
     int currCmdMarker = 0;
@@ -443,10 +419,6 @@
     // stream.
     SetState* currentState = NULL;
 
-    // TODO to prevent flushing the batch buffer too much, we only flush when wasBatch && !isBatch
-    // In the long term we can delete this and just flush once at the end of all geometry generation
-    bool wasBatch = false;
-
     while (iter.next()) {
         GrGpuTraceMarker newMarker("", -1);
         SkString traceString;
@@ -457,30 +429,13 @@
             ++currCmdMarker;
         }
 
-        bool isSetState = kSetState_Cmd == strip_trace_bit(iter->fType);
-
-        if (!isSetState && kDrawBatch_Cmd != strip_trace_bit(iter->fType)) {
-            // TODO see note above, this gets deleted once everyone uses batch drawing
-            if (wasBatch) {
-                wasBatch = false;
-                fBatchTarget.flush();
-            }
-        }
-
-        if (isSetState) {
+        if (kSetState_Cmd == strip_trace_bit(iter->fType)) {
             SetState* ss = reinterpret_cast<SetState*>(iter.get());
 
-            // TODO sometimes we have a prim proc, othertimes we have a GrBatch.  Eventually we will
-            // only have GrBatch and we can delete this
-            if (ss->fPrimitiveProcessor) {
-                this->getGpu()->buildProgramDesc(&ss->fDesc, *ss->fPrimitiveProcessor,
-                                                 ss->fPipeline,
-                                                 ss->fPipeline.descInfo(),
-                                                 ss->fBatchTracker);
-            } else {
-                wasBatch = true;
-            }
+            this->getGpu()->buildProgramDesc(&ss->fDesc, *ss->fPrimitiveProcessor, ss->fPipeline,
+                                             ss->fPipeline.descInfo(), ss->fBatchTracker);
             currentState = ss;
+
         } else {
             iter->execute(this, currentState);
         }
@@ -490,11 +445,6 @@
         }
     }
 
-    // TODO see note above, one last catch
-    if (wasBatch) {
-        fBatchTarget.flush();
-    }
-
     SkASSERT(fGpuCmdMarkers.count() == currCmdMarker);
     ++fDrawID;
 }
@@ -534,11 +484,6 @@
                             fCount, fStencilSettings);
 }
 
-void GrInOrderDrawBuffer::DrawBatch::execute(GrInOrderDrawBuffer* buf, const SetState* state) {
-    SkASSERT(state);
-    fBatch->generateGeometry(buf->getBatchTarget(), &state->fPipeline);
-}
-
 void GrInOrderDrawBuffer::SetState::execute(GrInOrderDrawBuffer*, const SetState*) {}
 
 void GrInOrderDrawBuffer::Clear::execute(GrInOrderDrawBuffer* buf, const SetState*) {
@@ -586,7 +531,7 @@
     ss->fPrimitiveProcessor->initBatchTracker(&ss->fBatchTracker,
                                               ss->fPipeline.getInitBatchTracker());
 
-    if (fPrevState && fPrevState->fPrimitiveProcessor.get() &&
+    if (fPrevState &&
         fPrevState->fPrimitiveProcessor->canMakeEqual(fPrevState->fBatchTracker,
                                                       *ss->fPrimitiveProcessor,
                                                       ss->fBatchTracker) &&
@@ -599,33 +544,6 @@
     return true;
 }
 
-bool GrInOrderDrawBuffer::recordStateAndShouldDraw(GrBatch* batch,
-                                                   const GrPipelineBuilder& pipelineBuilder,
-                                                   const GrScissorState& scissor,
-                                                   const GrDeviceCoordTexture* dstCopy) {
-    // TODO this gets much simpler when we have batches everywhere.
-    // If the previous command is also a set state, then we check to see if it has a Batch.  If so,
-    // and we can make the two batches equal, and we can combine the states, then we make them equal
-    SetState* ss = GrNEW_APPEND_TO_RECORDER(fCmdBuffer, SetState,
-                                            (batch, pipelineBuilder, *this->getGpu()->caps(), scissor,
-                                             dstCopy));
-    if (ss->fPipeline.mustSkip()) {
-        fCmdBuffer.pop_back();
-        return false;
-    }
-
-    batch->initBatchTracker(ss->fPipeline.getInitBatchTracker());
-
-    if (fPrevState && !fPrevState->fPrimitiveProcessor.get() &&
-        fPrevState->fPipeline.isEqual(ss->fPipeline)) {
-        fCmdBuffer.pop_back();
-    } else {
-        fPrevState = ss;
-        this->recordTraceMarkersIfNecessary();
-    }
-    return true;
-}
-
 void GrInOrderDrawBuffer::recordTraceMarkersIfNecessary() {
     SkASSERT(!fCmdBuffer.empty());
     SkASSERT(!cmd_has_trace_marker(fCmdBuffer.back().fType));