Don't check the framebuffer status every time we flush when we're on Chromium;

src/gpu/gl/GrGpuGL.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 "GrGpuGL.h"
 #include "GrGLStencilBuffer.h"
@@ skipping 1258 matching lines @@
     if (NULL != rect) {
         // flushScissor expects rect to be clipped to the target.
         clippedRect = *rect;
         SkIRect rtRect = SkIRect::MakeWH(rt->width(), rt->height());
         if (clippedRect.intersect(rtRect)) {
             rect = &clippedRect;
         } else {
             return;
         }
     }
+    
     this->flushRenderTarget(rect);
     GrAutoTRestore<ScissorState> asr(&fScissorState);
     fScissorState.fEnabled = (NULL != rect);
     if (fScissorState.fEnabled) {
         fScissorState.fRect = *rect;
     }
     this->flushScissor();
 
     GrGLfloat r, g, b, a;
     static const GrGLfloat scale255 = 1.f / 255.f;
@@ skipping 226 matching lines @@
 
 void GrGpuGL::flushRenderTarget(const SkIRect* bound) {
 
     GrGLRenderTarget* rt =
         static_cast<GrGLRenderTarget*>(this->drawState()->getRenderTarget());
     SkASSERT(NULL != rt);
 
     if (fHWBoundRenderTarget != rt) {
         GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, rt->renderFBOID()));
 #ifdef SK_DEBUG
-        GrGLenum status;
-        GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
-        if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
-            GrPrintf("GrGpuGL::flushRenderTarget glCheckFramebufferStatus %x\n", status);
+        // don't do this check in Chromium -- this is causing
+        // lots of repeated command buffer flushes when the compositor is
+        // rendering with Ganesh, which is really slow; even too slow for
+        // Debug mode.
+        if (!this->glContext().info().isChromium()) {
+            GrGLenum status;
+            GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
+            if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
+                GrPrintf("GrGpuGL::flushRenderTarget glCheckFramebufferStatus %x\n", status);
+            }
         }
 #endif
         fHWBoundRenderTarget = rt;
         const GrGLIRect& vp = rt->getViewport();
         if (fHWViewport != vp) {
             vp.pushToGLViewport(this->glInterface());
             fHWViewport = vp;
         }
     }
     if (NULL == bound || !bound->isEmpty()) {
@@ skipping 1143 matching lines @@
             this->setVertexArrayID(gpu, 0);
         }
         int attrCount = gpu->glCaps().maxVertexAttributes();
         if (fDefaultVertexArrayAttribState.count() != attrCount) {
             fDefaultVertexArrayAttribState.resize(attrCount);
         }
         attribState = &fDefaultVertexArrayAttribState;
     }
     return attribState;
 }