cc: Remove separate x/y raster scales.

cc/raster/gpu_raster_buffer_provider.cc

Index: cc/raster/gpu_raster_buffer_provider.cc
diff --git a/cc/raster/gpu_raster_buffer_provider.cc b/cc/raster/gpu_raster_buffer_provider.cc
index e7e4f9200ad100c02c050b101cf3b22872ec4fb7..97fb5812f5f986e4a4dd573b87f21230ddbd5333 100644
--- a/cc/raster/gpu_raster_buffer_provider.cc
+++ b/cc/raster/gpu_raster_buffer_provider.cc
@@ -32,7 +32,7 @@ static void RasterizeSource(
     const gfx::Size& resource_size,
     const gfx::Rect& raster_full_rect,
     const gfx::Rect& raster_dirty_rect,
-    const gfx::SizeF& scales,
+    float scale,
     const RasterSource::PlaybackSettings& playback_settings,
     ContextProvider* context_provider,
     ResourceProvider::ScopedWriteLockGL* resource_lock,
@@ -74,7 +74,7 @@ static void RasterizeSource(
   }
 
   raster_source->PlaybackToCanvas(sk_surface->getCanvas(), raster_full_rect,
-                                  playback_rect, scales, playback_settings);
+                                  playback_rect, scale, playback_settings);
 }
 
 }  // namespace
@@ -100,13 +100,13 @@ void GpuRasterBufferProvider::RasterBufferImpl::Playback(
     const gfx::Rect& raster_full_rect,
     const gfx::Rect& raster_dirty_rect,
     uint64_t new_content_id,
-    const gfx::SizeF& scales,
+    float scale,
     const RasterSource::PlaybackSettings& playback_settings) {
   TRACE_EVENT0("cc", "GpuRasterBuffer::Playback");
   client_->PlaybackOnWorkerThread(&lock_, sync_token_,
                                   resource_has_previous_content_, raster_source,
                                   raster_full_rect, raster_dirty_rect,
-                                  new_content_id, scales, playback_settings);
+                                  new_content_id, scale, playback_settings);
 }
 
 GpuRasterBufferProvider::GpuRasterBufferProvider(
@@ -198,7 +198,7 @@ void GpuRasterBufferProvider::PlaybackOnWorkerThread(
     const gfx::Rect& raster_full_rect,
     const gfx::Rect& raster_dirty_rect,
     uint64_t new_content_id,
-    const gfx::SizeF& scales,
+    float scale,
     const RasterSource::PlaybackSettings& playback_settings) {
   ContextProvider::ScopedContextLock scoped_context(worker_context_provider_);
   gpu::gles2::GLES2Interface* gl = scoped_context.ContextGL();
@@ -215,7 +215,7 @@ void GpuRasterBufferProvider::PlaybackOnWorkerThread(
 
   RasterizeSource(raster_source, resource_has_previous_content,
                   resource_lock->size(), raster_full_rect, raster_dirty_rect,
-                  scales, playback_settings, worker_context_provider_,
+                  scale, playback_settings, worker_context_provider_,
                   resource_lock, async_worker_context_enabled_,
                   use_distance_field_text_, msaa_sample_count_);