[DevTools] Pass inspected page bounds from frontend.

chrome/browser/devtools/devtools_contents_resizing_strategy.cc

 // Copyright 2014 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 "chrome/browser/devtools/devtools_contents_resizing_strategy.h"
 
 #include <algorithm>
 
 DevToolsContentsResizingStrategy::DevToolsContentsResizingStrategy() {
 }
 
 DevToolsContentsResizingStrategy::DevToolsContentsResizingStrategy(
     const gfx::Insets& insets, const gfx::Size& min_size)
     : insets_(insets),
       min_size_(min_size) {
 }
 
+DevToolsContentsResizingStrategy::DevToolsContentsResizingStrategy(
+    const gfx::Rect& bounds)
+    : bounds_(bounds) {
+}
+
+
 void DevToolsContentsResizingStrategy::CopyFrom(
     const DevToolsContentsResizingStrategy& strategy) {
   insets_ = strategy.insets();
   min_size_ = strategy.min_size();
+  bounds_ = strategy.bounds();
 }
 
 bool DevToolsContentsResizingStrategy::Equals(
     const DevToolsContentsResizingStrategy& strategy) {
-  return insets_ == strategy.insets() && min_size_ == strategy.min_size();
+  return insets_ == strategy.insets() && min_size_ == strategy.min_size() &&
+      bounds_ == strategy.bounds();
 }
 
 void ApplyDevToolsContentsResizingStrategy(
     const DevToolsContentsResizingStrategy& strategy,
     const gfx::Size& container_size,
     const gfx::Rect& old_devtools_bounds,
     const gfx::Rect& old_contents_bounds,
     gfx::Rect* new_devtools_bounds,
     gfx::Rect* new_contents_bounds) {
   new_devtools_bounds->SetRect(
       0, 0, container_size.width(), container_size.height());
 
   const gfx::Insets& insets = strategy.insets();
   const gfx::Size& min_size = strategy.min_size();
+  const gfx::Rect& bounds = strategy.bounds();
+
+  if (!bounds.size().IsEmpty()) {
+    int left = std::min(bounds.x(), container_size.width());
+    int top = std::min(bounds.y(), container_size.height());
+    int width = std::min(bounds.width(), container_size.width() - left);
+    int height = std::min(bounds.height(), container_size.height() - top);
+    new_contents_bounds->SetRect(left, top, width, height);
+    return;
+  }
 
   int width = std::max(0, container_size.width() - insets.width());
   int left = insets.left();
   if (width < min_size.width() && insets.width() > 0) {
     int min_width = std::min(min_size.width(), container_size.width());
     int insets_width = container_size.width() - min_width;
     int insets_decrease = insets.width() - insets_width;
     // Decrease both left and right insets proportionally.
     left -= insets_decrease * insets.left() / insets.width();
     width = min_width;
   }
   left = std::max(0, std::min(container_size.width(), left));
 
   int height = std::max(0, container_size.height() - insets.height());
   int top = insets.top();
   if (height < min_size.height() && insets.height() > 0) {
     int min_height = std::min(min_size.height(), container_size.height());
     int insets_height = container_size.height() - min_height;
     int insets_decrease = insets.height() - insets_height;
     // Decrease both top and bottom insets proportionally.
     top -= insets_decrease * insets.top() / insets.height();
     height = min_height;
   }
   top = std::max(0, std::min(container_size.height(), top));
 
   new_contents_bounds->SetRect(left, top, width, height);
 }