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The previous change (https://codereview.chromium.org/332893004/) wasn't quite right. To avoid errors, we need to only fire focus and load events when the web view itself has focus, not say when the location bar has focus. And because there are transient periods when we can't fire events, we need to keep track of whether we need to fire a focus event with a flag and fire it later.

BUG=368549
NOTRY=true

Review URL: https://codereview.chromium.org/344573003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278303 0039d316-1c4b-4281-b951-d872f2087c98