[android] Resize the android_webview if it's 0x0 initially.

android_webview/browser/browser_view_renderer_impl.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "android_webview/browser/browser_view_renderer_impl.h"
 
 #include <android/bitmap.h>
 
 #include "android_webview/common/renderer_picture_map.h"
 #include "android_webview/public/browser/draw_gl.h"
@@ skipping 458 matching lines @@
   // TODO(leandrogracia): this can be made unconditional once software rendering
   // uses Ubercompositor. Until then this path is required for SW invalidations.
   if (on_new_picture_mode_ == kOnNewPictureEnabled)
     client_->OnNewPicture(CapturePicture());
 
   // TODO(leandrogracia): delete when sw rendering uses Ubercompositor.
   // Invalidation should be provided by the compositor only.
   Invalidate();
 }
 
+void BrowserViewRendererImpl::OnPageScaleFactorChanged(
+    int process_id,
+    int render_view_id,
+    float page_scale_factor) {
+  CHECK_EQ(web_contents_->GetRenderProcessHost()->GetID(), process_id);
+  if (render_view_id != web_contents_->GetRoutingID())
+    return;
+
+  client_->OnPageScaleFactorChanged(page_scale_factor);
+}
+
 void BrowserViewRendererImpl::SetCompositorVisibility(bool visible) {
   if (compositor_visible_ != visible) {
     compositor_visible_ = visible;
     compositor_->SetVisible(compositor_visible_);
   }
 }
 
 void BrowserViewRendererImpl::ResetCompositor() {
   compositor_.reset(content::Compositor::Create(this));
   compositor_->SetRootLayer(scissor_clip_layer_);
@@ skipping 38 matching lines @@
 
 void BrowserViewRendererImpl::OnFrameInfoUpdated(
     const gfx::SizeF& content_size,
     const gfx::Vector2dF& scroll_offset,
     float page_scale_factor) {
   page_scale_ = page_scale_factor;
   content_size_css_ = content_size;
 }
 
 }  // namespace android_webview