Merge GPU fix to M17.

content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc

Index: content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc
===================================================================
--- content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc	(revision 127751)
+++ content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc	(working copy)
@@ -323,10 +323,6 @@
   cached_height_ = height;
 
   gl_->ResizeCHROMIUM(width, height);
-
-#ifdef FLIP_FRAMEBUFFER_VERTICALLY
-  scanline_.reset(new uint8[width * 4]);
-#endif  // FLIP_FRAMEBUFFER_VERTICALLY
 }
 
 #ifdef FLIP_FRAMEBUFFER_VERTICALLY
@@ -334,9 +330,10 @@
     uint8* framebuffer,
     unsigned int width,
     unsigned int height) {
-  uint8* scanline = scanline_.get();
-  if (!scanline)
+  if (width == 0)
     return;
+  scanline_.resize(width * 4);
+  uint8* scanline = &scanline_[0];
   unsigned int row_bytes = width * 4;
   unsigned int count = height / 2;
   for (unsigned int i = 0; i < count; i++) {