Revert of Add a mutex to GrContext::readSurfacePixels to protect against multiple CPU raster threads accessin…

src/gpu/GrContext.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 "GrContext.h"
 
@@ skipping 442 matching lines @@
     return true;
 }
 
 bool GrContext::readSurfacePixels(GrSurface* src,
                                   int left, int top, int width, int height,
                                   GrPixelConfig dstConfig, void* buffer, size_t rowBytes,
                                   uint32_t flags) {
     RETURN_FALSE_IF_ABANDONED
     ASSERT_OWNED_RESOURCE(src);
     SkASSERT(src);
-    SkAutoMutexAcquire ama(fReadPixelsMutex);
+
     // Adjust the params so that if we wind up using an intermediate surface we've already done
     // all the trimming and the temporary can be the min size required.
     if (!GrSurfacePriv::AdjustReadPixelParams(src->width(), src->height(),
                                               GrBytesPerPixel(dstConfig), &left,
                                               &top, &width, &height, &buffer, &rowBytes)) {
         return false;
     }
 
     if (!(kDontFlush_PixelOpsFlag & flags) && src->surfacePriv().hasPendingWrite()) {
         this->flush();
@@ skipping 270 matching lines @@
     }
     if (maxTextureBytes) {
         *maxTextureBytes = fResourceCache->getMaxResourceBytes();
     }
 }
 
 void GrContext::setResourceCacheLimits(int maxTextures, size_t maxTextureBytes) {
     fResourceCache->setLimits(maxTextures, maxTextureBytes);
 }