Add hooks for GL_EXT_debug_marker in gpu

src/gpu/GrInOrderDrawBuffer.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrInOrderDrawBuffer.h"
 
 #include "GrBufferAllocPool.h"
@@ skipping 423 matching lines @@
         rect = &r;
     }
     Clear* clr = this->recordClear();
     clr->fColor = color;
     clr->fRect = *rect;
     clr->fCanIgnoreRect = canIgnoreRect;
     clr->fRenderTarget = renderTarget;
     renderTarget->ref();
 }
 
+void GrInOrderDrawBuffer::onInstantGpuTraceEvent(const char* marker) {
+    // TODO: adds command to buffer
+}
+
+void GrInOrderDrawBuffer::onPushGpuTraceEvent(const char* marker) {
+    // TODO: adds command to buffer
+}
+
+void GrInOrderDrawBuffer::onPopGpuTraceEvent() {
+    // TODO: adds command to buffer
+}
+
 void GrInOrderDrawBuffer::reset() {
     SkASSERT(1 == fGeoPoolStateStack.count());
     this->resetVertexSource();
     this->resetIndexSource();
     int numDraws = fDraws.count();
     for (int d = 0; d < numDraws; ++d) {
         // we always have a VB, but not always an IB
         SkASSERT(NULL != fDraws[d].fVertexBuffer);
         fDraws[d].fVertexBuffer->unref();
         SkSafeUnref(fDraws[d].fIndexBuffer);
@@ skipping 399 matching lines @@
     fCmds.push_back(kCopySurface_Cmd);
     return &fCopySurfaces.push_back();
 }
 
 
 void GrInOrderDrawBuffer::clipWillBeSet(const GrClipData* newClipData) {
     INHERITED::clipWillBeSet(newClipData);
     fClipSet = true;
     fClipProxyState = kUnknown_ClipProxyState;
 }