Fixed bug in allocation of temporary scanline during frame buffer readback.

webkit/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc

Index: webkit/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
diff --git a/webkit/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc b/webkit/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
index 42ada0cd3511f8975ac2c2158a9c033eb99ebe0d..e3a8400bf70c0f7e734919f164d263b85f3eef60 100644
--- a/webkit/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
+++ b/webkit/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
@@ -706,10 +706,6 @@ void WebGraphicsContext3DInProcessCommandBufferImpl::reshape(
   // ClearContext();
 
   gl_->ResizeCHROMIUM(width, height);
-
-#ifdef FLIP_FRAMEBUFFER_VERTICALLY
-  scanline_.reset(new uint8[width * 4]);
-#endif  // FLIP_FRAMEBUFFER_VERTICALLY
 }
 
 WebGLId WebGraphicsContext3DInProcessCommandBufferImpl::createCompositorTexture(
@@ -731,9 +727,10 @@ void WebGraphicsContext3DInProcessCommandBufferImpl::FlipVertically(
     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++) {