Rename GrOptDrawState to GrPipeline and GrDrawState to GrPipelineBuilder

BUG=skia:

Review URL: https://codereview.chromium.org/858343002
diff --git a/src/gpu/GrBitmapTextContext.cpp b/src/gpu/GrBitmapTextContext.cpp
index 2df3a71..f39e7a1 100755
--- a/src/gpu/GrBitmapTextContext.cpp
+++ b/src/gpu/GrBitmapTextContext.cpp
@@ -529,8 +529,8 @@
     }
 
     if (fCurrVertex > 0) {
-        GrDrawState drawState;
-        drawState.setFromPaint(fPaint, fContext->getRenderTarget());
+        GrPipelineBuilder pipelineBuilder;
+        pipelineBuilder.setFromPaint(fPaint, fContext->getRenderTarget());
 
         // setup our sampler state for our text texture/atlas
         SkASSERT(SkIsAlign4(fCurrVertex));
@@ -550,7 +550,8 @@
                 // TODO: move supportsRGBCoverage check to setupCoverageEffect and only add LCD
                 // processor if the xp can support it. For now we will simply assume that if
                 // fUseLCDText is true, then we have a known color output.
-                if (!drawState.getXPFactory()->supportsRGBCoverage(0, kRGBA_GrColorComponentFlags)) {
+                const GrXPFactory* xpFactory = pipelineBuilder.getXPFactory();
+                if (!xpFactory->supportsRGBCoverage(0, kRGBA_GrColorComponentFlags)) {
                     SkDebugf("LCD Text will not draw correctly.\n");
                 }
                 break;
@@ -574,7 +575,7 @@
                                                                             params));
                 fEffectTextureUniqueID = textureUniqueID;
             }
-            drawState.addColorProcessor(fCachedTextureProcessor.get());
+            pipelineBuilder.addColorProcessor(fCachedTextureProcessor.get());
         } else {
             uint32_t textureUniqueID = fCurrTexture->getUniqueID();
             if (textureUniqueID != fEffectTextureUniqueID ||
@@ -594,7 +595,7 @@
 
         int nGlyphs = fCurrVertex / kVerticesPerGlyph;
         fDrawTarget->setIndexSourceToBuffer(fContext->getQuadIndexBuffer());
-        fDrawTarget->drawIndexedInstances(&drawState,
+        fDrawTarget->drawIndexedInstances(&pipelineBuilder,
                                           fCachedGeometryProcessor.get(),
                                           kTriangles_GrPrimitiveType,
                                           nGlyphs,