Let DM run unit tests.
  - refactor GYPs and a few flags
  - make GPU tests grab a thread-local GrContextFactory when needed as we do in DM for GMs
  - add a few more UI features to make DM more like tests

I believe this makes the program 'tests' obsolete.

It should be somewhat faster to run the two sets together than running the old binaries serially:
  - serial: tests 20s (3m18s CPU), dm 21s (3m01s CPU)
  - together: 27s (6m21s CPU)

Next up is to incorporate benches.  I'm only planning there on a single-pass sanity check, so that won't obsolete the program 'bench' just yet.

Tested: out/Debug/tests && out/Debug/dm && echo ok
BUG=skia:

Committed: http://code.google.com/p/skia/source/detail?r=13586

R=reed@google.com, bsalomon@google.com, mtklein@google.com, tfarina@chromium.org

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/178273002

git-svn-id: http://skia.googlecode.com/svn/trunk@13592 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/dm/DMTaskRunner.cpp b/dm/DMTaskRunner.cpp
index 22269a4..bd53ce6 100644
--- a/dm/DMTaskRunner.cpp
+++ b/dm/DMTaskRunner.cpp
@@ -3,10 +3,21 @@
 
 namespace DM {
 
-TaskRunner::TaskRunner(int cputhreads, int gpuThreads)
+
+TaskRunner::TaskRunner(int cputhreads)
     : fMain(cputhreads)
-    , fGpu(gpuThreads)
-    {}
+    , fGpu(1) {
+    // Enqueue a task on the GPU thread to create a GrContextFactory.
+    struct Create : public SkRunnable {
+        Create(GrContextFactory** ptr) : fPtr(ptr) {}
+        void run() SK_OVERRIDE {
+            *fPtr = SkNEW(GrContextFactory);
+            delete this;
+        }
+        GrContextFactory** fPtr;
+    };
+    fGpu.add(SkNEW_ARGS(Create, (&fGrContextFactory)));
+}
 
 void TaskRunner::add(Task* task) {
     if (task->usesGpu()) {
@@ -17,6 +28,17 @@
 }
 
 void TaskRunner::wait() {
+    // Enqueue a task on the GPU thread to destroy the GrContextFactory.
+    struct Delete : public SkRunnable {
+        Delete(GrContextFactory* ptr) : fPtr(ptr) {}
+        void run() SK_OVERRIDE {
+            delete fPtr;
+            delete this;
+        }
+        GrContextFactory* fPtr;
+    };
+    fGpu.add(SkNEW_ARGS(Delete, (fGrContextFactory)));
+
     // These wait calls block until the threadpool is done.  We don't allow
     // children to spawn new GPU tasks so we can wait for that first knowing
     // we'll never try to add to it later.  Same can't be said of fMain: fGpu