Set CRWWebViewContentView's size before resetting scroll proxy.

ios/web/web_state/ui/crw_web_view_content_view.mm

Index: ios/web/web_state/ui/crw_web_view_content_view.mm
diff --git a/ios/web/web_state/ui/crw_web_view_content_view.mm b/ios/web/web_state/ui/crw_web_view_content_view.mm
index 36ff49cbc3c78ce80e4d4072c27ab8bff02b4642..b94fbbc7cf0bd9fd397b1b07e07ea79c03d9cacb 100644
--- a/ios/web/web_state/ui/crw_web_view_content_view.mm
+++ b/ios/web/web_state/ui/crw_web_view_content_view.mm
@@ -79,17 +79,6 @@ const CGFloat kBackgroundRGBComponents[] = {0.75f, 0.74f, 0.76f};
                                            green:kBackgroundRGBComponents[1]
                                             blue:kBackgroundRGBComponents[2]
                                            alpha:1.0];
-    // The frame needs to be set immediately after the web view is added
-    // as a subview. The change in the frame triggers drawing operations and
-    // if not done after it's added as a subview, the web view exhibits
-    // strange behavior where clicks from certain web sites are not triggered.
-    // The actual value of the frame doesn't matter as long as it's not
-    // CGRectZero.  The CRWWebViewContentView's frame will be reset to a correct
-    // value in a subsequent layout pass.
-    // TODO(crbug.com/577793): This is an undocumented and not-well-understood
-    // workaround for this issue.
-    const CGRect kDummyRect = CGRectMake(10, 20, 30, 50);
-    self.frame = kDummyRect;
   }
 }
 
@@ -97,6 +86,20 @@ const CGFloat kBackgroundRGBComponents[] = {0.75f, 0.74f, 0.76f};
   return [_webView becomeFirstResponder];
 }
 
+- (void)setFrame:(CGRect)frame {
+  CGSize oldSize = self.frame.size;
+  [super setFrame:frame];
+  if (!CGSizeEqualToSize(oldSize, self.frame.size))

[shreyasv1, 2016/02/09 22:58:18]

NIT: How about early returning in the method by comparing it with |frame|?

[kkhorimoto, 2016/02/10 00:08:36]

Done.

+    [self updateWebViewFrame];
+}
+
+- (void)setBounds:(CGRect)bounds {
+  CGSize oldSize = self.bounds.size;
+  [super setBounds:bounds];
+  if (!CGSizeEqualToSize(oldSize, self.bounds.size))
+    [self updateWebViewFrame];
+}
+
 #pragma mark Accessors
 
 - (UIScrollView*)scrollView {